I am new to studying Special Relativity and have some trouble truly understanding what the phrase (Frame of Reference) tries to imply.
So I understand that an inertial frame of reference, for example, is one where newton's first law hold. I am a little confused about when they wouldn't hold..
The famous merry-go-round example of non-inertial frames of reference suggests, by definition, that from some point of view, or from a certain angle, Newton's 1st law doesn't hold.. how is that?
I would appreciate if someone would provide some form of example by which I can understand what exactly is a frame of reference (like a camera looking at a physical system?), and what is the splitting hair between inertial and non-inertial ones. I've been searching and reading a lot, but I never had that "AHA!" moment.